Accession Number : ADA139944

Title :   Observations of Inertio-Gravity Waves in the Wake of Hurricane Frederic.

Descriptive Note : Master's thesis,


Personal Author(s) : Shay,L K

PDF Url : ADA139944

Report Date : Dec 1983

Pagination or Media Count : 121

Abstract : Inertial waves excited in the mixed layer by hurricane Frederic, had horizontal scales of approximately 1 to 2 times the haroclinic Rossby radius of deformation (50 km) of the first mode near the Desoto Canyon. Initially, energy propagated vertically at about 1.25 km/d and horizontally at 80 km/d. These waves spun down over e-folding scales of four inertial periods as energy propagated vertically at 270 m/d and horizontally at 30 km/d. Inertio-gravity waves in the deep thermocline had horizontal scales of 25 to 50 km and vertical scales approximately equal to the water depth. The energy of these waves was dominated by the barotropic mode with some contributions from modes 1 and 2. These waves were not admitted to the self region because the bottom slope was greater than the slope of the internal wave characteristics. The mean flow followed the isobaths at all levels, but it was in the opposite direction in the bottom layer. The mean flow initially decreased along the eastern boundary of the canyon as the storm forcing readjusted the flow. Near-bottom temperature variations of 4 C were associated with the storm surge and advection in the along-track direction, particularly along the north rim of the canyon.

Descriptors :   *Ocean currents, *Hurricanes, Mexico Gulf, Gravity waves, Temperature, Variations, Statistical analysis, Theses

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE